<template>
  <div class="home">
    <el-container class="home_container">
      <!-- 头部区域 -->
      <el-header>
        <div>
          <img src="../assets/logo.png" alt="" class="header_logo" />
          <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
      </el-header>
      <!-- 页面主题区域 -->
      <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <!-- 侧边栏菜单区域 -->
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409EFF"
            unique-opened
            :collapse="isCollapse"
            :collapse-transition="false"
            router
            :default-active="activePath"
          >
          <!-- 一级菜单 -->
            <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
                <!-- 一级菜单的模板区域 -->
              <template slot="title">
                <!-- 一级菜单的图标  通过对象的key,进而取出值-->
                <i :class="iconObject[item.id]"></i>
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                    <template slot="title">
                        <i class="el-icon-menu"></i>
                        <span>{{subItem.authName}}</span>
                    </template>
              </el-menu-item>
            </el-submenu>
           
          </el-menu>
        </el-aside>
        <!-- 右侧边主题 -->
        <el-main>
            <!-- 路由占位符 -->
            <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>
<script>
  export default {
    data(){
      return{
        menuList:[],
        // 这是一个图标对象，把每一项菜单的id，作为对象的key,图标类作为对象的值
        iconObject:{
          '125':'iconfont icon-group-full',
          '103':'iconfont icon-lifangtilitiduomiantifangkuai2',
          '101':'iconfont icon-shangpinguanli',
          '102':'iconfont icon-dingdanguanli',
          '145':'iconfont icon-shujutongji'
        },
        // 是否折叠
        isCollapse:false,
        // 被激活的链接地址
        activePath:''
      }
    },
    created(){
      this.getMenuList(),
      this.activePath=window.sessionStorage.getItem('activePath')
      
    },
    methods: {
      logout() {
        window.sessionStorage.clear();
        this.$router.push("/login");
      },
      // 获取所有的菜单
      async getMenuList(){
        const {data}=await this.$http.get('menus')
        // console.log('获取菜单数据',data)
        if(data.meta.status!==200) return this.$message.error(data.meta.msg);
        this.menuList=data.data
        // console.log('ppp',this.menuList)
      },
      // 点击按钮切换菜单的折叠与展开
      toggleCollapse(){
          this.isCollapse=!this.isCollapse
      },
      // 保存链接的激活状态
      saveNavState(activePath){
          // console.log('ggg',activePath)
          window.sessionStorage.setItem('activePath',activePath)
          this.activePath=activePath
      }
    },
  };
</script>
<style lang="less" scoped>
  .home,
  .home_container {
    height: 100%;
  }
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #fff;
    font-size: 20px;
    padding-left: 0;
    > div{
      display: flex;
      align-items: center;
      span{
        margin-left: 15px;
      }
      img{
        width: 30px;
        height: 30px;
      }
    }
  }
  .el-aside {
    background-color: #333744;
    .el-menu{
      border-right:none
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
  .toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color:#fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor:pointer
  }
  .iconfont{
    margin-right: 10px;
  }
</style>
